Description

The hline_set(), vline_set(), whline_set(), wvline_set() functions draw a line, in either
the window stdscr or win starting at the current cursor
position. The line is drawn using the character wch and is a
maximum of n positions long, or as many as will fit into the
window. If wch is a null pointer, the default horizontal or
vertical character is used.

The mvhline_set(), mvvline_set(), mvwhline_set(), mvwvline_set() functions are similar to the previous
group of functions but the line begins at cursor position specified
by x and y.

The functions with names ending with hline_set() draw horizontal lines proceeding towards
the last column of the same line. The functions with names ending
with vline_set() draw vertical lines proceeding towards the last column of the
same line.